12657530 has 16 divisors (see below), whose sum is σ = 23020200. Its totient is φ = 5010432.

The previous prime is 12657527. The next prime is 12657539. The reversal of 12657530 is 3575621.

It can be written as a sum of positive squares in 4 ways, for example, as 10220809 + 2436721 = 3197^2 + 1561^2 .

It is a super-3 number, since 3×12657530³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12657493 and 12657502.

It is not an unprimeable number, because it can be changed into a prime (12657539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5555 + ... + 7494.

Almost surely, 2^12657530 is an apocalyptic number.

12657530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12657530 is a deficient number, since it is larger than the sum of its proper divisors (10362670).

12657530 is a wasteful number, since it uses less digits than its factorization.

12657530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13153.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 12657530 is about 3557.7422616036. The cubic root of 12657530 is about 233.0502939930.

The spelling of 12657530 in words is "twelve million, six hundred fifty-seven thousand, five hundred thirty".